CN113460998A - High-temperature thermal shock material continuous production equipment and method based on capacitance discharge - Google Patents
High-temperature thermal shock material continuous production equipment and method based on capacitance discharge Download PDFInfo
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- CN113460998A CN113460998A CN202110703271.3A CN202110703271A CN113460998A CN 113460998 A CN113460998 A CN 113460998A CN 202110703271 A CN202110703271 A CN 202110703271A CN 113460998 A CN113460998 A CN 113460998A
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Abstract
The invention discloses high-temperature thermal shock material continuous production equipment and method based on capacitance discharge. The charging power supply charges the discharging capacitor, the charging is stopped when sufficient voltage is charged, the switch device receives a control device signal to close the circuit, the discharging capacitor discharges the sample to perform high-temperature thermal shock processing, and the monitoring device records voltage and current data for later-stage processing. The processed sample falls into the conveying device and is conveyed to the screening device, the material with larger granularity returns to the vibrating feeder for secondary reaction through the pipeline, and the small-material-degree material after screening and filtering falls into the collecting bucket. The invention realizes the continuous production and manufacture of automatic charging, material mixing, feeding, compression, working discharge and discharging in the preparation of the high-temperature thermal shock material, and can be used for the high-temperature thermal shock manufacture of various nano materials.
Description
Technical Field
The disclosure relates to the field of material production equipment, in particular to high-temperature thermal shock material continuous production equipment and method based on capacitance discharge for continuous production of material high-temperature synthesis.
Background
Conventional materials are synthesized by thermal radiation heating methods including hydrothermal/solvothermal methods, furnace calcination, water/oil bath heating, and chemical vapor deposition CVD.
In particular, most nanomaterials, such as metal oxides and hydroxides, are typically obtained using a water/solvothermal treatment in the temperature range of 100-. These precursors are further annealed at high temperature and in a specific atmosphere using a furnace, and the precursors are subjected to heating, holding and cooling processes to convert the precursors into carbides, nitrides, sulfides and phosphides.
CVD is a bottom-up process for synthesizing graphene on copper foil, in which a carbon-containing gas is flowed into a high-temperature tube furnace. Furthermore, nanomaterials, especially metal nanoparticles, have been widely prepared using water/oil baths. In contrast to hydrothermal/solvothermal processes, water/oil baths are typically run at ambient pressure rather than at elevated pressure.
The heating mode of the material production equipment commonly used in the industry at present is heat radiation heating, and the requirement on the performance of the production equipment is very high, and high energy consumption and high cost are implied. Therefore, a low-cost, high-efficiency and continuous production high-temperature material synthesis method is urgently needed to be developed to reduce the production cost of the products of enterprises and improve the product quality.
Disclosure of Invention
Based on the above mentioned problems of energy consumption and cost, high performance and low cost materials are prepared in batches by a joule heating high temperature thermal shock method of capacitive discharge.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
high temperature thermal shock material serialization production facility based on electric capacity discharge includes:
the rotary worktable is provided with a bin for containing materials; and
the mixing and feeding assembly is used for uniformly mixing heterogeneous reactants to form a material and providing the material for rotary working; and
the compression assembly is used for compressing and compacting the loose materials in the storage bin; and
the capacitor charging and discharging assembly is used for thermally shocking the material at high temperature; and
the material collecting assembly is used for unloading, screening and collecting the materials subjected to high-temperature thermal shock treatment; and
the gas protection component is used for providing a vacuum or inert gas protection space for the treatment of the materials,
in the rotating process of the rotary workbench, materials sequentially pass through the processes of compression, high-temperature thermal shock and unloading, and are circularly reciprocated, so that continuous production is realized.
And the material secondary recovery assembly is used for sending the unqualified products screened by the material collection assembly back to the material mixing assembly for secondary treatment.
Furthermore, the rotary workbench comprises a working motor, a workbench base and a workbench, wherein a plurality of through holes are uniformly distributed in the circumferential direction of the workbench to serve as storage bins, the workbench base is positioned below the workbench, and the workbench is driven by the working motor to rotate relative to the workbench base; the position that the workstation corresponds and mixes feed subassembly, compression subassembly, electric capacity charge-discharge subassembly and material collection subassembly is equipped with feed station, compression station, discharge station and the station of unloading respectively, and at workstation pivoted in-process, the feed bin passes through each station in proper order, carries out corresponding processing to the material.
Further, mix the feed subassembly and include mechanical agitator and vibrating feeder, mechanical agitator is located vibrating feeder's top, and vibrating feeder's discharge gate is located the top of feed bin.
Further, electric capacity charge-discharge subassembly includes the positive electrode that discharges, the negative electrode that discharges, switching device, monitoring devices, the electric capacity that discharges, charging source and controlgear, and charging source charges to the electric capacity that discharges, stops charging when filling sufficient voltage, and switching device receives controlgear signal closed circuit, and the positive electrode that discharges and the negative electrode that discharges are located the both ends of feed bin, discharges when the electric capacity that discharges and carries out high temperature thermal shock processing to the sample, and monitoring devices record voltage current data in order to post processing.
Furthermore, the gas protection assembly comprises a shell and a gas cylinder or a vacuumizing device, wherein the gas cylinder or the vacuumizing device is provided with a valve and is connected to the shell through a pipeline, so that a vacuum cavity or an inert gas protection space is formed in the shell.
Furthermore, the compression assembly drives the pressing block to do reciprocating compression motion in the storage bin by the compression push rod.
Furthermore, the material collecting assembly comprises a collecting barrel, a screening device and a conveying device, wherein the conveying device is used for conveying the materials subjected to high-temperature thermal shock to the screening device, and the screening device is used for sorting qualified materials and enabling the qualified materials to fall into the collecting barrel.
Further, the subassembly is retrieved in material secondary treatment includes pipeline and fan, and screening plant is connected to the one end of pipeline, and the feed subassembly is mixed in the other end connection, and the fan passes through the pipeline with the non-qualification product that sieves out and carries out secondary operation to mixing the feed subassembly.
The continuous production method of the high-temperature thermal shock material based on the capacitance discharge comprises the following steps:
step 1) feeding, wherein a rotary workbench rotates a bin to a feeding station, and materials are uniformly mixed by a mechanical stirrer and then are conveyed to the bin through a vibrating feeder;
step 2) compressing, wherein after feeding is finished, a working motor drives a workbench to convey the material to a compression station, and a compression assembly compresses the material to compact the loose material;
step 3) high-temperature thermal shock, wherein the material is conveyed to a discharging station by a rotary enclosure of a workbench, a charging power supply charges a discharging capacitor, the charging is stopped when sufficient voltage is charged, a switch device receives a control equipment signal to close a circuit, the discharging capacitor discharges a sample to perform high-temperature thermal shock processing, and a monitoring device records voltage and current data for later processing;
step 4) screening, wherein the materials subjected to high-temperature thermal shock treatment are conveyed to a screening device through a discharge conveyor belt, and the materials with the granularity lower than a set threshold value of the screening device fall into a collecting barrel after being treated by the screening device;
and 5) carrying out secondary recovery reaction, wherein the materials with the granularity higher than the set screening device threshold value are treated and screened by the screening device and then are returned to the vibrating feeder through the fan and the pipeline for secondary reaction.
Further, materials with the resistance larger than 10 omega are subjected to pre-carbonization treatment at a discharge station by using the voltage of 60-100V, so that the capacitor is promoted to better generate large-current electric pulses in millisecond level in the discharge process.
Further, step 1), providing a vacuum or inert gas protection space for the continuous production of the high-temperature thermal shock material based on the capacitance discharge, wherein the inert gas is argon or nitrogen
Further, the capacitor discharges in a single pulse mode, the voltage is 0-500V, and the discharge time is 20-2000 ms.
The invention discloses the following technical effects:
the invention provides high-temperature thermal shock material continuous production equipment and method based on capacitance discharge, which combine a periodic single high-power electric pulse high-temperature thermal shock material preparation method with a continuous production method, can be applied to industrial production, effectively avoid high energy consumption and low efficiency of related materials prepared by a traditional thermal radiation heating method, realize rapid and continuous production of the related materials, and greatly reduce the production cost of the related materials. The method is simple, controllable in process, low in cost and has great commercial application potential.
Drawings
FIG. 1 is a schematic structural diagram of a continuous production system for high-temperature thermal shock materials according to the present invention;
FIG. 2 shows a top view of the inventive table;
FIG. 3 shows a three-dimensional view of the inventive table;
FIG. 4 is a flow chart of a continuous production method of a high temperature thermal shock material according to example 1 of the present invention;
FIG. 5 illustrates a schematic diagram of the present invention;
in the figure, a mechanical stirrer-1, a vibrating feeder-2, a compression push rod-3, a control device-4, a switching device-5, a monitoring device-6, a discharge negative electrode-7, a working motor-8, a discharge capacitor-9, a charging power supply-10, a collecting barrel-11, a screening device-12, a conveying device-13, a workbench base-14, a workbench-15, a discharge positive electrode-16, a pipeline-17 shell-18, an air bottle-19, a feeding station-15-1, a compression station-15-2, a discharge station-15-3, a discharging station-15-4, an axle hole 15-5 and a storage bin 15-6.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples.
Various cross-sectional views illustrating embodiments in accordance with the present disclosure are not drawn to scale, wherein certain details are exaggerated and may be omitted for clarity. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.
Example 1
Referring to fig. 1 to 4, a method for continuously producing graphene with high temperature thermal shock based on capacitive discharge.
Mix the feed subassembly, including mechanical agitator 1 and vibrating feeder 2, mechanical agitator 1 is located vibrating feeder 2's top, send rotary worktable by vibrating feeder 2 after forming the material with inhomogeneous reactant misce bene. Rotary wrench
The rotary worktable comprises a working motor 8, a worktable base 14 and a worktable 15, wherein the working motor 8 drives the worktable 15 to rotate around a central shaft relative to the worktable base 14, four material bins 15-6 are uniformly distributed on the worktable 15 in the circumferential direction, and when the mixed feeding assembly feeds materials, a discharge hole of the mixed feeding assembly is over against one material bin 15-6; the centers of the workbench base 14 and the workbench 15 are correspondingly provided with shaft holes 15-5 which are used for being connected with a motor shaft of the working motor 8. The rotary workbench is provided with four stations which are respectively a feeding station 15-1, a compression station 15-2, a discharging station 15-3 and an unloading station 15-4, wherein the feeding station is arranged corresponding to the mixed feeding assembly, the compression station 15-2 is arranged corresponding to the compression assembly, the discharging station is arranged corresponding to the capacitor charging and discharging assembly, and the unloading station is arranged corresponding to the material collecting assembly. The bottom of the workbench is provided with a discharge hole at the discharge station.
The capacitor charging and discharging assembly comprises a positive discharging electrode 16, a negative discharging electrode 7, a switching device 5, a monitoring device 6, a discharging capacitor 9, a charging power supply 10 and a control device 4, and is responsible for charging and discharging management of the capacitor and monitoring of signals. The charging power supply 10 charges the discharging capacitor 9, the charging is stopped when sufficient voltage is charged, the switching device 5 receives a signal of the control device 4 to close a circuit, the discharging positive electrode and the discharging negative electrode are located at two ends of the stock bin, the discharging negative electrode is embedded in the base of the workbench, the discharging positive electrode is located above the workbench, corresponds to the discharging negative electrode, is pushed into the stock bin by an electric or hydraulic push rod, high-temperature thermal shock processing is carried out on sample discharging, and the monitoring device 6 records voltage and current data for later-stage processing.
The compression push rod 3 is arranged above the compression station, a pressing block matched with the inner diameter of the storage bin is arranged at the bottom end of the compression push rod, and the compression push rod drives the pressing block to perform reciprocating compression movement on materials in the storage bin. An elastic component, such as a spring and the like, can be arranged between the pressing block and the compression push rod 3 and is used for playing a role of buffering. A mounting bracket can be arranged above the rotary worktable and used for mounting an electric or hydraulic push rod and a compression push rod.
The material collecting assembly comprises a collecting barrel 11, a screening device 12 and a conveying device 13, wherein the conveying device is an inclined conveying belt, a discharging hole is connected to the higher end of the conveying device, the lower end of the conveying device is connected to the screening device, the material subjected to high-temperature thermal shock is conveyed to the screening device, qualified materials are sorted out by the screening device and fall into the collecting barrel 11.
The material secondary treatment recovery assembly comprises a pipeline 17 and a fan, wherein one end of the pipeline is connected with a screening device, the other end of the pipeline is connected with a vibrating feeder of the mixed feeding assembly, and the fan conveys screened non-qualified products to the vibrating feeder through the pipeline to perform secondary processing.
The working steps are as follows:
Example 2
Referring to fig. 1 to 4, a method for continuously producing a graphene material from a high-temperature thermal shock material based on capacitive discharge.
The vibrating feeder 2 is used for vibrating feeding;
the working motor 8 is connected with the rotary worktable 15 and provides kinetic energy for the rotation of the worktable 15, so that the materials reach the designated station; the feeding station 15-1 is positioned at the lower end of the vibrating feeder 2, and the materials are well dispersed by the vibrating feeder and are loaded into the feeding station 15-1; the working motor 8 drives the compressor to rotate to a compression station 15-2, and the compressor drives the compressor to a discharge station 15-3 after compression; the switch device closes the switch conducting circuit, and generates millisecond-level electric pulse to the material to generate high-temperature thermal shock so as to generate the graphene material;
the generated graphene materials are further transferred to a discharging station and conveyed to a screening device through a conveyor belt, the insufficiently reacted materials with larger particle sizes are conveyed back to the feeder 2 through a pipeline 17 to be subjected to secondary reaction, and the materials with qualified particle sizes are conveyed to the collecting barrel 11, specifically referring to embodiment 1.
Materials with the resistance larger than 10 omega are subjected to pre-carbonization treatment at a discharge station by adopting a small voltage of 60-100V, so that the capacitor is promoted to better generate millisecond-level large-current electric pulses in the discharge process.
Example 3
Referring to fig. 1-4, a method for continuously producing high-temperature thermal shock carbon-supported metal particles based on capacitive discharge.
The mechanical stirrer mechanically stirs and mixes the metal salt solution and the carbon source evenly;
the rest is the same as example 2.
Before implementation, the housing 18 is formed into a vacuum chamber or a protective space of inert gas, such as argon or nitrogen. Is composed of
The working principle of the continuous production process of the high-temperature thermal shock material is explained in detail below, so that the continuous production process of the high-temperature thermal shock material is more clearly understood by those skilled in the art.
The materials are stirred and compressed and then are sent to a discharging station 15-3 of a workbench 15; alternating current supplied in the market outputs direct current of 0-400V through a rectifier, the output direct current stores energy through a discharge capacitor 9, after the charging process is stopped for 5-10 minutes, a switch device 5 is closed, the discharge capacitor 9 discharges through positive and negative electrodes, electric pulses generated by the capacitor completely contact with a material body through the electrodes, a plasma channel is generated in the material, high temperature above 3000 ℃ is generated in the material due to joule heat in 50-2000 milliseconds, and a principle diagram of high-temperature thermal shock can refer to fig. 5. Due to the high temperature and stress waves generated in these plasma channels, the high temperature rapidly graphitizes the material, converting amorphous carbon into graphitized carbon, and the stress waves cause the stacked graphite domains to be exfoliated into few-layer or single-layer graphene materials. For carbon-supported metal particles, high temperature can also reduce metal salts to metal oxides or elemental metals, and the ultrafast heating and cooling rates can enable the metals to be anchored on the carbon carrier.
Compared with the known method for preparing the material by high-temperature thermal shock, the method disclosed by the invention is simple and easy to operate, is more suitable for continuous and uninterrupted production, and is more suitable for large-scale industrial production.
The emphasis of each embodiment in the present specification is on the difference from the other embodiments, and the same and similar parts among the various embodiments may be referred to each other.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. Accordingly, the above-described embodiments of the present invention are to be considered as illustrative only and not restrictive, the scope of the invention being indicated by the appended claims, and not by the foregoing description, and any changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (12)
1. High temperature thermal shock material serialization production facility based on electric capacity discharges, its characterized in that includes:
the rotary worktable is provided with a bin for containing materials; and
the mixing and feeding assembly is used for uniformly mixing heterogeneous reactants to form a material and providing the material for rotary working; and
the compression assembly is used for compressing and compacting the loose materials in the storage bin; and
the capacitor charging and discharging assembly is used for thermally shocking the material at high temperature; and
the material collecting assembly is used for unloading, screening and collecting the materials subjected to high-temperature thermal shock treatment; and
the gas protection component is used for providing a vacuum or inert gas protection space for the treatment of the materials,
in the rotating process of the rotary workbench, materials sequentially pass through the processes of compression, high-temperature thermal shock and unloading, and are circularly reciprocated, so that continuous production is realized.
2. The continuous production equipment for the high-temperature thermal shock material based on the capacitive discharge as claimed in claim 1, further comprising a material secondary recovery assembly for returning the rejected products screened by the material collection assembly to the material mixing and feeding assembly for secondary treatment; the material secondary treatment recovery assembly comprises a pipeline and a fan, one end of the pipeline is connected with the material collecting assembly, the other end of the pipeline is connected with the mixed feeding assembly, and the fan conveys non-qualified products screened out by the material collecting assembly to the mixed feeding assembly through the pipeline to perform secondary processing.
3. The continuous production equipment for the high-temperature thermal shock material based on the capacitive discharge according to claim 1, wherein the rotary worktable comprises a working motor, a worktable base and a worktable, a plurality of through holes are uniformly distributed in the circumferential direction of the worktable to serve as a storage bin, the worktable base is positioned below the worktable, and the worktable is driven by the working motor to rotate relative to the worktable base; the position that the workstation corresponds and mixes feed subassembly, compression subassembly, electric capacity charge-discharge subassembly and material collection subassembly is equipped with feed station, compression station, discharge station and the station of unloading respectively, and at workstation pivoted in-process, the feed bin passes through each station in proper order, carries out corresponding processing to the material.
4. The continuous production equipment for the high-temperature thermal shock materials based on the capacitive discharge as claimed in claim 1, wherein the mixing and feeding assembly comprises a mechanical stirrer and a vibrating feeder, the mechanical stirrer is located above the vibrating feeder, and a discharge port of the vibrating feeder is located above a storage bin.
5. The continuous production equipment for the high-temperature thermal shock material based on the capacitive discharge as claimed in claim 1, wherein the capacitive charge-discharge assembly comprises a discharge positive electrode, a discharge negative electrode, a switching device, a monitoring device, a discharge capacitor, a charge power supply and a control device, the charge power supply charges the discharge capacitor, the charge power supply stops charging when sufficient voltage is charged, the switching device receives a signal of the control device to close a circuit, the discharge positive electrode and the discharge negative electrode are located at two ends of a storage bin, when the discharge capacitor discharges a sample for high-temperature thermal shock treatment, the monitoring device records voltage and current data for later processing.
6. The continuous production equipment for the high-temperature thermal shock material based on the capacitive discharge according to claim 1, wherein the gas protection assembly comprises a shell and a gas cylinder or a vacuum extractor, the gas cylinder or the vacuum extractor is provided with a valve and is connected to the shell through a pipeline, so that a vacuum cavity or an inert gas protection space is formed in the shell.
7. The continuous production equipment for the high-temperature thermal shock material based on the capacitive discharge as claimed in claim 1, wherein the compression assembly is driven by a compression push rod to make a reciprocating compression motion in the storage bin.
8. The continuous production equipment for the high-temperature thermal shock materials based on the capacitive discharge as claimed in claim 1, wherein the material collection assembly comprises a collection barrel, a screening device and a conveying device, the conveying device is used for conveying the materials subjected to the high-temperature thermal shock to the screening device, and the screening device is used for sorting qualified materials and dropping the qualified materials into the collection barrel.
9. The continuous production method of the high-temperature thermal shock material based on the capacitance discharge by using the equipment of any one of claims 1 to 8 is characterized by comprising the following steps:
step 1) feeding, wherein a rotary workbench rotates a bin to a feeding station, and materials are uniformly mixed by a mechanical stirrer and then are conveyed to the bin through a vibrating feeder;
step 2) compressing, wherein after feeding is finished, a working motor drives a workbench to convey the material to a compression station, and a compression assembly compresses the material to compact the loose material;
step 3) high-temperature thermal shock, wherein the material is conveyed to a discharging station by a rotary enclosure of a workbench, a charging power supply charges a discharging capacitor, the charging is stopped when sufficient voltage is charged, a switch device receives a control equipment signal to close a circuit, the discharging capacitor discharges a sample to perform high-temperature thermal shock processing, and a monitoring device records voltage and current data for later processing;
step 4), unloading and sorting, wherein the materials subjected to high-temperature thermal shock treatment are conveyed to a screening device through an unloading conveyor belt, and the materials with the granularity lower than a set threshold value of the screening device fall into a collecting barrel after being treated by the screening device;
and 5) carrying out secondary recovery reaction, wherein the materials with the granularity higher than the set screening device threshold value are treated and screened by the screening device and then are returned to the vibrating feeder through the fan and the pipeline for secondary reaction.
10. The continuous production method of the high-temperature thermal shock material based on the capacitive discharge according to claim 9, wherein the material with the resistance of more than 10 Ω is pre-carbonized at a discharge station at a voltage of 60-100V before the step 3).
11. The method for continuously producing high-temperature thermal shock materials based on capacitive discharge according to claim 9, wherein a vacuum or inert gas protection space is provided for the continuous production of high-temperature thermal shock materials based on capacitive discharge.
12. The continuous production method of high-temperature thermal shock material based on capacitive discharge according to claim 9, wherein the capacitive discharge is single pulse electricity, the voltage is 0-500V, and the discharge time is 20-2000 ms.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113321210A (en) * | 2021-06-24 | 2021-08-31 | 中国矿业大学 | Method and device for rapidly repairing waste cathode carbon based on high-temperature thermal shock |
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| US3001237A (en) * | 1956-12-31 | 1961-09-26 | James D Hedges | Method of making carbon articles |
| JPH08164320A (en) * | 1994-03-31 | 1996-06-25 | Masuda Yoshiko | High voltage pulse power source and pulse corona application device using same |
| CN101700493A (en) * | 2003-03-28 | 2010-05-05 | 三菱重工业株式会社 | Method and apparatus for treating waste |
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